scripts/Makefile.build

   1 # SPDX-License-Identifier: GPL-2.0
   2 # ==========================================================================
   3 # Building
   4 # ==========================================================================
   5
   6 # Modified for U-Boot
   7 prefix := vpl
   8 src := $(patsubst $(prefix)/%,%,$(obj))
   9 ifeq ($(obj),$(src))
  10 prefix := tpl
  11 src := $(patsubst $(prefix)/%,%,$(obj))
  12 ifeq ($(obj),$(src))
  13 prefix := spl
  14 src := $(patsubst $(prefix)/%,%,$(obj))
  15 ifeq ($(obj),$(src))
  16 prefix := .
  17 endif
  18 endif
  19 endif
  20
  21 PHONY := __build
  22 __build:
  23
  24 # Init all relevant variables used in kbuild files so
  25 # 1) they have correct type
  26 # 2) they do not inherit any value from the environment
  27 obj-y :=
  28 obj-m :=
  29 lib-y :=
  30 lib-m :=
  31 always :=
  32 targets :=
  33 subdir-y :=
  34 subdir-m :=
  35 EXTRA_AFLAGS   :=
  36 EXTRA_CFLAGS   :=
  37 EXTRA_CPPFLAGS :=
  38 EXTRA_LDFLAGS  :=
  39 asflags-y  :=
  40 ccflags-y  :=
  41 cppflags-y :=
  42 ldflags-y  :=
  43
  44 subdir-asflags-y :=
  45 subdir-ccflags-y :=
  46
  47 # Read auto.conf if it exists, otherwise ignore
  48 # Modified for U-Boot
  49 -include include/config/auto.conf
  50 -include $(prefix)/include/autoconf.mk
  51 include scripts/Makefile.uncmd_spl
  52
  53 include scripts/Kbuild.include
  54
  55 # The filename Kbuild has precedence over Makefile
  56 kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
  57 kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile)
  58 include $(kbuild-file)
  59
  60 # Added for U-Boot
  61 asflags-y  += $(PLATFORM_CPPFLAGS)
  62 ccflags-y  += $(PLATFORM_CPPFLAGS)
  63 cppflags-y += $(PLATFORM_CPPFLAGS)
  64
  65 include scripts/Makefile.lib
  66
  67 # Do not include host rules unless needed
  68 ifneq ($(hostprogs-y)$(hostprogs-m)$(hostlibs-y)$(hostlibs-m)$(hostcxxlibs-y)$(hostcxxlibs-m),)
  69 include scripts/Makefile.host
  70 endif
  71
  72 ifndef obj
  73 $(warning kbuild: Makefile.build is included improperly)
  74 endif
  75
  76 # ===========================================================================
  77
  78 ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),)
  79 lib-target := $(obj)/lib.a
  80 endif
  81
  82 ifneq ($(strip $(obj-y) $(obj-m) $(obj-) $(subdir-m) $(lib-target)),)
  83 builtin-target := $(obj)/built-in.o
  84 endif
  85
  86 modorder-target := $(obj)/modules.order
  87
  88 # We keep a list of all modules in $(MODVERDIR)
  89
  90 __build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \
  91          $(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \
  92          $(subdir-ym) $(always)
  93         @:
  94
  95 # Linus' kernel sanity checking tool
  96 ifeq ($(KBUILD_CHECKSRC),1)
  97   quiet_cmd_checksrc       = CHECK   $<
  98         cmd_checksrc       = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
  99 else ifeq ($(KBUILD_CHECKSRC),2)
 100   quiet_cmd_force_checksrc = CHECK   $<
 101         cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
 102 endif
 103
 104 # Do section mismatch analysis for each module/built-in.o
 105 ifdef CONFIG_DEBUG_SECTION_MISMATCH
 106   cmd_secanalysis = ; scripts/mod/modpost $@
 107 endif
 108
 109 # Compile C sources (.c)
 110 # ---------------------------------------------------------------------------
 111
 112 # Default is built-in, unless we know otherwise
 113 modkern_cflags =                                          \
 114         $(if $(part-of-module),                           \
 115                 $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \
 116                 $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL))
 117 quiet_modtag := $(empty)   $(empty)
 118
 119 $(real-objs-m)        : part-of-module := y
 120 $(real-objs-m:.o=.i)  : part-of-module := y
 121 $(real-objs-m:.o=.s)  : part-of-module := y
 122 $(real-objs-m:.o=.lst): part-of-module := y
 123
 124 $(real-objs-m)        : quiet_modtag := [M]
 125 $(real-objs-m:.o=.i)  : quiet_modtag := [M]
 126 $(real-objs-m:.o=.s)  : quiet_modtag := [M]
 127 $(real-objs-m:.o=.lst): quiet_modtag := [M]
 128
 129 $(obj-m)              : quiet_modtag := [M]
 130
 131 # Default for not multi-part modules
 132 modname = $(basetarget)
 133
 134 $(multi-objs-m)         : modname = $(modname-multi)
 135 $(multi-objs-m:.o=.i)   : modname = $(modname-multi)
 136 $(multi-objs-m:.o=.s)   : modname = $(modname-multi)
 137 $(multi-objs-m:.o=.lst) : modname = $(modname-multi)
 138 $(multi-objs-y)         : modname = $(modname-multi)
 139 $(multi-objs-y:.o=.i)   : modname = $(modname-multi)
 140 $(multi-objs-y:.o=.s)   : modname = $(modname-multi)
 141 $(multi-objs-y:.o=.lst) : modname = $(modname-multi)
 142
 143 quiet_cmd_cc_s_c = CC $(quiet_modtag)  $@
 144 cmd_cc_s_c       = $(CC) $(c_flags) $(DISABLE_LTO) -fverbose-asm -S -o $@ $<
 145
 146 $(obj)/%.s: $(src)/%.c FORCE
 147         $(call if_changed_dep,cc_s_c)
 148
 149 quiet_cmd_cc_i_c = CPP $(quiet_modtag) $@
 150 cmd_cc_i_c       = $(CPP) $(c_flags)   -o $@ $<
 151
 152 $(obj)/%.i: $(src)/%.c FORCE
 153         $(call if_changed_dep,cc_i_c)
 154
 155 cmd_gensymtypes =                                                           \
 156     $(CPP) -D__GENKSYMS__ $(c_flags) $< |                                   \
 157     $(GENKSYMS) $(if $(1), -T $(2))                                         \
 158      $(if $(KBUILD_PRESERVE),-p)                                            \
 159      -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null))
 160
 161 quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
 162 cmd_cc_symtypes_c =                                                         \
 163     set -e;                                                                 \
 164     $(call cmd_gensymtypes,true,$@) >/dev/null;                             \
 165     test -s $@ || rm -f $@
 166
 167 $(obj)/%.symtypes : $(src)/%.c FORCE
 168         $(call cmd,cc_symtypes_c)
 169
 170 # C (.c) files
 171 # The C file is compiled and updated dependency information is generated.
 172 # (See cmd_cc_o_c + relevant part of rule_cc_o_c)
 173
 174 quiet_cmd_cc_o_c = CC $(quiet_modtag)  $@
 175
 176 ifndef CONFIG_MODVERSIONS
 177 cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
 178
 179 else
 180 # When module versioning is enabled the following steps are executed:
 181 # o compile a .tmp_<file>.o from <file>.c
 182 # o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does
 183 #   not export symbols, we just rename .tmp_<file>.o to <file>.o and
 184 #   are done.
 185 # o otherwise, we calculate symbol versions using the good old
 186 #   genksyms on the preprocessed source and postprocess them in a way
 187 #   that they are usable as a linker script
 188 # o generate <file>.o from .tmp_<file>.o using the linker to
 189 #   replace the unresolved symbols __crc_exported_symbol with
 190 #   the actual value of the checksum generated by genksyms
 191
 192 cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $<
 193 cmd_modversions =                                                               \
 194         if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then             \
 195                 $(call cmd_gensymtypes,$(KBUILD_SYMTYPES),$(@:.o=.symtypes))    \
 196                     > $(@D)/.tmp_$(@F:.o=.ver);                                 \
 197                                                                                 \
 198                 $(LD) $(KBUILD_LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F)               \
 199                         -T $(@D)/.tmp_$(@F:.o=.ver);                            \
 200                 rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver);                \
 201         else                                                                    \
 202                 mv -f $(@D)/.tmp_$(@F) $@;                                      \
 203         fi;
 204 endif
 205
 206 ifdef CONFIG_FTRACE_MCOUNT_RECORD
 207 # gcc 5 supports generating the mcount tables directly
 208 ifneq ($(call cc-option,-mrecord-mcount,y),y)
 209 KBUILD_CFLAGS += -mrecord-mcount
 210 else
 211 # else do it all manually
 212 ifdef BUILD_C_RECORDMCOUNT
 213 ifeq ("$(origin RECORDMCOUNT_WARN)", "command line")
 214   RECORDMCOUNT_FLAGS = -w
 215 endif
 216 # Due to recursion, we must skip empty.o.
 217 # The empty.o file is created in the make process in order to determine
 218 #  the target endianness and word size. It is made before all other C
 219 #  files, including recordmcount.
 220 sub_cmd_record_mcount =                                 \
 221         if [ $(@) != "scripts/mod/empty.o" ]; then      \
 222                 $(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)";   \
 223         fi;
 224 recordmcount_source := $(srctree)/scripts/recordmcount.c \
 225                     $(srctree)/scripts/recordmcount.h
 226 else
 227 sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \
 228         "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \
 229         "$(if $(CONFIG_64BIT),64,32)" \
 230         "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS)" \
 231         "$(LD) $(KBUILD_LDFLAGS)" "$(NM)" "$(RM)" "$(MV)" \
 232         "$(if $(part-of-module),1,0)" "$(@)";
 233 recordmcount_source := $(srctree)/scripts/recordmcount.pl
 234 endif
 235 cmd_record_mcount =                                             \
 236         if [ "$(findstring $(CC_FLAGS_FTRACE),$(_c_flags))" =   \
 237              "$(CC_FLAGS_FTRACE)" ]; then                       \
 238                 $(sub_cmd_record_mcount)                        \
 239         fi;
 240 endif # -record-mcount
 241 endif
 242
 243 define rule_cc_o_c
 244         $(call echo-cmd,checksrc) $(cmd_checksrc)                         \
 245         $(call echo-cmd,cc_o_c) $(cmd_cc_o_c);                            \
 246         $(cmd_modversions)                                                \
 247         $(call echo-cmd,record_mcount)                                    \
 248         $(cmd_record_mcount)                                              \
 249         scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' >    \
 250                                                       $(dot-target).tmp;  \
 251         rm -f $(depfile);                                                 \
 252         mv -f $(dot-target).tmp $(dot-target).cmd
 253 endef
 254
 255 # Built-in and composite module parts
 256 $(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE
 257         $(call cmd,force_checksrc)
 258         $(call if_changed_rule,cc_o_c)
 259
 260 # Single-part modules are special since we need to mark them in $(MODVERDIR)
 261
 262 $(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE
 263         $(call cmd,force_checksrc)
 264         $(call if_changed_rule,cc_o_c)
 265         @{ echo $(@:.o=.ko); echo $@; } > $(MODVERDIR)/$(@F:.o=.mod)
 266
 267 quiet_cmd_cc_lst_c = MKLST   $@
 268       cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \
 269                      $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \
 270                                      System.map $(OBJDUMP) > $@
 271
 272 $(obj)/%.lst: $(src)/%.c FORCE
 273         $(call if_changed_dep,cc_lst_c)
 274
 275 # Compile assembler sources (.S)
 276 # ---------------------------------------------------------------------------
 277
 278 modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL)
 279
 280 $(real-objs-m)      : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
 281 $(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
 282
 283 quiet_cmd_as_s_S = CPP $(quiet_modtag) $@
 284 cmd_as_s_S       = $(CPP) $(a_flags)   -o $@ $<
 285
 286 $(obj)/%.s: $(src)/%.S FORCE
 287         $(call if_changed_dep,as_s_S)
 288
 289 quiet_cmd_as_o_S = AS $(quiet_modtag)  $@
 290 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
 291
 292 $(obj)/%.o: $(src)/%.S FORCE
 293         $(call if_changed_dep,as_o_S)
 294
 295 targets += $(real-objs-y) $(real-objs-m) $(lib-y)
 296 targets += $(extra-y) $(MAKECMDGOALS) $(always)
 297
 298 # Linker scripts preprocessor (.lds.S -> .lds)
 299 # ---------------------------------------------------------------------------
 300 quiet_cmd_cpp_lds_S = LDS     $@
 301       cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \
 302                              -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $<
 303
 304 $(obj)/%.lds: $(src)/%.lds.S FORCE
 305         $(call if_changed_dep,cpp_lds_S)
 306
 307 # ASN.1 grammar
 308 # ---------------------------------------------------------------------------
 309 quiet_cmd_asn1_compiler = ASN.1   $@
 310       cmd_asn1_compiler = $(objtree)/tools/asn1_compiler $< \
 311                                 $(subst .h,.c,$@) $(subst .c,.h,$@)
 312
 313 $(obj)/%.asn1.c $(obj)/%.asn1.h: $(src)/%.asn1 $(objtree)/tools/asn1_compiler
 314         $(call cmd,asn1_compiler)
 315
 316 # Build the compiled-in targets
 317 # ---------------------------------------------------------------------------
 318
 319 # To build objects in subdirs, we need to descend into the directories
 320 $(sort $(subdir-obj-y)): $(subdir-ym) ;
 321
 322 #
 323 # Rule to compile a set of .o files into one .o file
 324 #
 325 ifdef builtin-target
 326 quiet_cmd_link_o_target = AR      $@
 327 # If the list of objects to link is empty, just create an empty built-in.o
 328 cmd_link_o_target = $(if $(strip $(obj-y)),\
 329                       rm -f $@; $(AR) cDPrsT $@ $(filter $(obj-y), $^), \
 330                       rm -f $@; $(AR) cDPrsT$(KBUILD_ARFLAGS) $@)
 331
 332 $(builtin-target): $(obj-y) FORCE
 333         $(call if_changed,link_o_target)
 334
 335 targets += $(builtin-target)
 336 endif # builtin-target
 337
 338 #
 339 # Rule to create modules.order file
 340 #
 341 # Create commands to either record .ko file or cat modules.order from
 342 # a subdirectory
 343 modorder-cmds =                                         \
 344         $(foreach m, $(modorder),                       \
 345                 $(if $(filter %/modules.order, $m),     \
 346                         cat $m;, echo kernel/$m;))
 347
 348 $(modorder-target): $(subdir-ym) FORCE
 349         $(Q)(cat /dev/null; $(modorder-cmds)) > $@
 350
 351 #
 352 # Rule to compile a set of .o files into one .a file
 353 #
 354 ifdef lib-target
 355 quiet_cmd_link_l_target = AR      $@
 356 cmd_link_l_target = rm -f $@; $(AR) cDPrsT$(KBUILD_ARFLAGS) $@ $(lib-y)
 357
 358 $(lib-target): $(lib-y) FORCE
 359         $(call if_changed,link_l_target)
 360
 361 targets += $(lib-target)
 362 endif
 363
 364 quiet_cmd_link_multi-y = AR      $@
 365 cmd_link_multi-y = rm -f $@; $(AR) cDPrsT$(KBUILD_ARFLAGS) $@ $(filter %.o,$^)
 366
 367 quiet_cmd_link_multi-m = AR [M]  $@
 368 cmd_link_multi-m = $(cmd_link_multi-y)
 369
 370 $(multi-used-y): FORCE
 371         $(call if_changed,link_multi-y)
 372 $(call multi_depend, $(multi-used-y), .o, -objs -y)
 373
 374 $(multi-used-m): FORCE
 375         $(call if_changed,link_multi-m)
 376         @{ echo $(@:.o=.ko); echo $(filter %.o,$^); } > $(MODVERDIR)/$(@F:.o=.mod)
 377 $(call multi_depend, $(multi-used-m), .o, -objs -y)
 378
 379 targets += $(multi-used-y) $(multi-used-m)
 380
 381
 382 # Add intermediate targets:
 383 # When building objects with specific suffix patterns, add intermediate
 384 # targets that the final targets are derived from.
 385 intermediate_targets = $(foreach sfx, $(2), \
 386                                 $(patsubst %$(strip $(1)),%$(sfx), \
 387                                         $(filter %$(strip $(1)), $(targets))))
 388 # %.lex.o <- %.lex.c <- %.l
 389 # %.tab.o <- %.tab.[ch] <- %.y
 390 targets += $(call intermediate_targets, .lex.o, .lex.c) \
 391            $(call intermediate_targets, .tab.o, .tab.c .tab.h)
 392
 393 # Descending
 394 # ---------------------------------------------------------------------------
 395
 396 PHONY += $(subdir-ym)
 397 $(subdir-ym):
 398         $(Q)$(MAKE) $(build)=$@
 399
 400 # Add FORCE to the prequisites of a target to force it to be always rebuilt.
 401 # ---------------------------------------------------------------------------
 402
 403 PHONY += FORCE
 404
 405 FORCE:
 406
 407 # Read all saved command lines and dependencies for the $(targets) we
 408 # may be building above, using $(if_changed{,_dep}). As an
 409 # optimization, we don't need to read them if the target does not
 410 # exist, we will rebuild anyway in that case.
 411
 412 cmd_files := $(wildcard $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd))
 413
 414 ifneq ($(cmd_files),)
 415   include $(cmd_files)
 416 endif
 417
 418 # Create directories for object files if they do not exist
 419 obj-dirs := $(sort $(obj) $(patsubst %/,%, $(dir $(targets))))
 420 $(shell mkdir -p $(obj-dirs))
 421
 422 .PHONY: $(PHONY)